Device for controlling vertically sliding windows



April 30, 1940. w. YOUNG 2.198.751

DEVICE FOR CONTROLLING VERTICALLY SLIDING WINDOWS.

Filed Aug 22-, 1938 I s Sheets-Sheet 1 M- g vz w P I w. YOUNG I 2.198.751'

DEVICE FOR CONTROLLING VERTICALLY SLIDING WINDOWS Filed Aug. 22, 1938 3 Sheets-Sheet 3 g a portion removed.

Patented Apr. 30, 1940 PATENT- oFFic DEVICE FOR CONTROLLING VERTICALLY. x SLIDING WINDOWS l l l .Wil liam Younggwisha scotland Application August 22, 1938, Serial No. 226,167

l In Great Britain August 30, 1937 j screws. (01. 16- 200) This inventionrelates to devices for controlling veiticallysliding windows and more particularly applicable to those mounted on vehicle bodies. ,wvarioustypes of such device have been proposed, the! object of which is' tomake the window .easilyslidableup and downwithout any effort to the. operator and at the same time will mains tainthe window in any position without moving.

duel-to rattling, shaking or othe'r vibration of the .said vehicle. Such devices are not always suocessful inkeeping the window in the desiredpo-l sition) and further, many of; them need effortto Dushthem' in one direction or the otherand the pressurewhichis needed to operate them is not .Yconstant over the whole range. .Furthensuch devices are oftencomplicated and expensive 'to produce and one ofitheobjects of the present invention is to devise asimple and cheap device in whichthe pressure atall timesto move the wingop dow will be constant over substantially the whole travelboth up and down and inwhichthe win dow willwremain put? inc-any position so that it will not move from the. position in which it is .1 Another provided with cam surfaces engaging with ayoke ,o-r. siipper member which is pressed against them by means of compression springs housed in a spring bo lAnother object of th einvention is to provide a self balancing window which will stay in any posi: tion and; which will not be inclined to move. due {to jolts,;bumps or other movement of the vehicle on.which itpismounted. 1 a

{I Theinvention will now be described, by way oi example, as applied to the. door of a vehicle;

with rreference to the accompanying drawings in V window,

-Hl igure 1 is ajfr onjt elevation of the device with mAcoording to: one: form of the invention illustrated in Figures-l;2 and. 3 of the drawings, a

spring box A is providedwhich comprises two thin metal platesBB, which are stamped out so object coi -the invention is to provide a l self balancing windowin which the lever arms are that they form whenput together three tubular cylindricallyl shaped casings C C C situated side by side, the two plates being secured together by suitable rivets or pins D. At the top of the spring box the plates are spaced apart a sufficient distance to form a slot E to allow two lever arms F,F to be pivotally mounted therebetween. These two lever arms F,F are pivoted about separate points G G at the topof the spring box, by suit-.

able pins or the like. The two lever arms are provided withcam-shaped members or surfaces H,H made integral therewith, which cams are adaptedto engage a slipper or yoke member J mounted loosely between the two said plates 3,3 of the spring box; The yoke member J is pressed up againstithe two cams. on the lever armsby means of threehlical springs K K K3 situated one i n each of the said tubular casings C C C so that the free ends of the arms F,F aregpressed upwards and will tend to come together. yoke member J is provided with two depending projections J J which enter the springs K K to locate it centrally and prevent it from moving sideways. If desired, a projection for each spring may be provided. The space or slot Ebetween the two plates BB is made sufficiently long to permit of up and down movement of the yoke member J and movement of the lever arms F,F. Atxthe bottomocf the spring box A a suitable cross-piece L islprovided which engages the bottom of the three springs-K K K and this is pressed up towards the springs .by means of a setscrew M so that thetension of the said springs against the yoke member may be altered to suit circumstances. The setscrew M engages in a U- shaped member or setscrew support N which is tapped or threaded for the purpose and. is se-l cured to the ends of the two plates 13,3 of the spring box by rivets O or the like. is provided onthe setscrew M if required. The U-shaped member or setsorew support. N may contain a nutorthe like instead of being tapped or threaded and it may be made integral with the spring box, if desired. l g

The spring box is secured to the non-movable part of the window-frame or to the door of a vehicle, for instance, in which the window slides by screws or any other suitable means passing through holes Q in the plates 3,3. The two free ends of the lever arms are each provided with a roller or pin P which slides or rolls in a slot S in. a member Tmounted on the bottom channel of the movable part of the windowR, Thepins may rotate in the slots at the same time as they slide along when the windowis raised up and A lock nut M travel, Say the last half inch of its travebmay.

be increased so as to'ensure closing of the window under all circumstances, but the pressure remains constant over all the rest of the travel. In this manner, the window may be moved up and down very easily and will remain put in any position. The cams will always be sliding over the.

surface of the yoke member whenany movement takes place and'the friction between these parts is suflicient to prevent the device from moving of its own-accord.

Instead-of havin three tubular. cylindrical casings for three springs, one or more springs may beemployed withv the appropriate number of casings according to the size of the Window and the space available. By havingthree small diameter springs instead of onegthel diameter of the springs is considerably reduced and the thickness, of the device is made a minimum sothat it takes up only a very small amount of roomin the door or otheivpart of the body in which it is fitted, re-

sulting in additional seating room being provided. If desired, the springs instead of being helical may be made of any other suitable shape such as zigzag or they may be leaf springs or the like.

The ends of the two lever arms are provided with teeth V so that they will move in unison, and

consequently windows which are unstable in position by reason-of their shape, orare not guided at each side, can be successfully-moved up and down without'jamming. If, however, the device is to beapplied to windows which. are stable'or are guided at each side, then said teeth on. the

' lever arms may be dispensed with, as the window itself will keep the'arms moving inunison.

The cams onthelever arms, if desired, may be provided with notches .Z or'flats shown in Figure 4, with whichthe yoke member J will 'co-operate so a's'to create catching or stopping places in. the

movement. of the window at any pre-arrange'd positions and'such positions will be obvious to the feelwhen the. said'window is raised up and down;

Instea'dofl'having. a projection on the window or. its framing to operate the closing and opening thereof, winding. means may be employed.

For example, a rotatable handle W (Figure '5) may bemounted upon part of the body, door or the like in which the window slides, or on. the spring box having a gear wheel engaging with the teeth V'upon the ends of the leverarms Fso as to raise or lower the window bythe' rotation of the said handle in the usual manner, the amountof movement of the handle beinggoverned by the size of the gear;

'I'he spring box A itself, instead ofbeing rigidly secured to the door or other part of the body in which the windowis mounted may be pivotallysecured thereto at the point X as shown in Figure 6; such that the whole'window itself may pivot about this point in-its own vertical plane. In order to permit this to take place, the slot in which the window slides on one side or the other is preferably extended sideways so that the window may swinginto the extension of the slot then pressing it downwards.

taking up the position shown in chain dottedlines in Figure 6, and thereby provide a small vertical opening I, whichwill permit a limited amount of ventilation without actually lowering the window. Sometimes it is an advantage to have the vertical opening instead of a horizontal opening,

as it may have more effect in extracting air from the inside without causing, draughts.

Alternatively, in order to permit the window to move to create this vertical opening]; the window may bodily slide horizontallyalong the rollers P in the slot S as shown in Figure 7 into a suitable slot or the like provided at the side of,

theuvindow frame, to take up the position shown in chain dottedlines in Figure 7. Thiswill also give a slight vertical opening for ventilation purposes. A suitable handle or knob U is provided for moving. the window horizontally.

The bottom of the extension of the slot in which the windowslides may be curved or sloped into the other part ofthe guide'as shown at Y so that when the window isopen witha slight vertical opening and downward pressureis. ap

plied thereto, the curved portionof the slot in which the window slides will pull the window backj again. to its, normal, horizontal position so that it will then descendin the normal manner with-L out having necessarily to perform the double movement of sliding: the window sideways and whole window pivoting about the point on .the. spring box, the window can also be presseddowns and will then function in the normal manner.

Or, if desired, it can be swung about the hori- In thecase of the:

. wards, even when there is av vertical opening,

which is used for adjusting the tension of the springs may be dispensed with and no adjustm'ent may be provided in certain cases.

Furthenfor'narrow windows, one lever arm of the device maybe dispensed withanclthe springs willthen. be so situated that either one or more press directly through a suitable thrust pieceor slipper onto the camumember and the yoke member'common. to'the twocams is'then unnec-- ess'ary. Such a lever device is very'suitable for narrow windows', when there is no room'to house;

the'twoarmsr i The device is more particularly designed for mass production and allthe parts are preferably stamped out and put together by riveting or other means, but may be made in any other way,

ifdesired; i

It is to be understood that althoughthe device is'described as beingattached to the bottom rail of the window for windowsopening downwards it may be connected to the top rail ror' windows opening upwards and further that vari-" ous alterations in details from those describedmay be made without departing of the invention;

Iclaim: 1. In a device for counterbalancing vertically slidable windows, a spring box, at least one-lever arm one end of which is pivotally 'mountedupon said spring box and the other end adapted to g 60 from the scope spring box, a pair of lever arms pivotally mounted at one end in the spring box and adapted to make contact with the said window atthe other end, a cam shaped surface provided upon each of the said lever arms, a slipper member mounted insaid spring box so as to reciprocate in a straight line, and compression springs mounted in said spring box to press said slipper member against said cam surfaces so that they slide over thesaid slipper member.

3. In a device for counterbalancing vertically slidable windows the combination comprising a spring box, a pair of lever arms pivotally mounted at oneend in the spring box and adapted to make contact with the said window at the other end, gear teeth on the pivoted ends of said lever arms" engaging one another causing the said arms to move in unison, a cam shaped surface provided upon the portion of each of the said lever arms adjacent to said gear teeth, a slipper member mounted in said spring box s'oas to reciprocate in a straight line, and compression springs mounted in said spring box to press said slipper member against said cam surfaces so that they slide over the said slipper member.

4. In a device for counterbalancing vertically slidable windows the combination comprising a spring box, a pair of lever arms pivotally mounted at one end in the spring box and adapted to make contact with the said window at the other end, a cam shaped surface provided upon each of the said lever arms, a slipper member mounted in said spring box so as to reciprocate in a straight line, a pluralityof tubular casings insaid spring box, and acompression, spring located in each tubular casing, said compression springs pressing said slippermember against said cam surfaces.

5. In a device for counterbalancing vertically slidable windows the combination comprising a spring box, a pair of lever arms pivotally mounted at one end in the spring box and adapted to make contact with the said window at the other end, gear teeth on the pivoted ends of said lever arms engaging oneanother causing the said arms to move in unison, a cam shaped surface provided upon the portion of each of the said lever arms adjacent said gear teeth, a slipper member mounted in said springbox soas to reciprocate in a straight line, a plurality of tubular casings in said spring box, and a compression spring located in each tubular casing, said compression springs pressing said slipper member against said cam surfaces.

WILLIAM YOUNG; 

